tests: replace `tac` reimplementation by `sort -r`

Authored by martinvonz.

Description

tests: replace tac reimplementation by sort -r

sort -r is better code "formatter" than tac since it's
stable. It's also portable so we don't need to reimplement it in
Python.

Differential Revision: https://phab.mercurial-scm.org/D5239

Details

Committed
martinvonzWed, Nov 7, 1:29 PM
Differential Revision
D5239: tests: replace `tac` reimplementation by `sort -r`
Parents
rHG2ad56a9b983b: tests: work around `tac` not being portable
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